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#1 |
Registered User
Join Date: Aug 2009
Location: Oregon
Posts: 611
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What is RPO code YD3? ("Proc Opt Axle")
I have a '79 C30 with the 14 bolt FF rear end. I didn't think there was anything special about it until I noticed I could do 2 legged burnouts.
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#2 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Re: What is RPO code YD3? ("Proc Opt Axle")
PROfessional COP Twin AXLE. This was a very rare option that was available to law enforcement agencies only.
I have no idea what it really means... ![]()
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#3 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,194
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Re: What is RPO code YD3? ("Proc Opt Axle")
I suspect it means "Processing Optional Axle" or "Process Option: Axle".
Within the engineering release there are several different kinds of codes: RPOs (Regular Production Options); SEOs (Special Equipment Options, like for fleets) Non Merchandising Options and Processing Options. The latter two are not offered to the public but are internal options used to keep the release strings straight, to provide cross balance or to provide a general option family that more specific (selectable) options fall under. Said differently, Non Merchandising Options and Processing Options are not ones that you can go to the dealership and choose; they just help keep everything straight within the assembly plant. I suspect your truck has the base axle (my book says "YD3 - base equipment"). That big C30 axle probably has enough drag in the open differential to allow you to do "two legged burnouts". K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 09-02-2009 at 07:16 AM. |
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#4 |
Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,454
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Re: What is RPO code YD3? ("Proc Opt Axle")
Only thing I can find is:
YD3 : FRONT AXLE, BASE EQUIPMENT FOR SCHEDULING, GVW PLATE
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS |
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